Sandwich Mat is a 3 layer Composite Mat, consists of Synthetic Non Woven Core in the centre, Chop Strands on both sides . All the three layers are firmly held together by stitch binding. The technical details are as under :

First Layer Chop Strands 300 / 450 / 600 gr/m2 +/- 10%
  Type of Glass E-Glass,
  Fibre Length 50 mm
  Resin Compatibility Polyster / Epoxy

Middle Layer PP Non Woven 180 gr/m2 +/- 10%

Third Layer Chop Strands 300 / 450 / 600 gr/m2 +/- 10%
  Type of Glass E-Glass,
  Fibre Length 50 mm
  Resin Compatibility Polyster / Epoxy

Binder Polyester Yarn 15 to 25 gr/m2
  Denier 85 Denier
  Stitching - Pattern Tricot
                - Length 3 to 5 mm
                - Guage 7 (stitches / inch )

Sandwich Mat Avg. Mass / Uint Area 780, 1080, 1380 gr/m2 +/- 10%
  Moisture Content 0.20 % Max
  Width 1.0 mtr
  Lenght / Roll As per customer requirement.
  Weight / Cartons As per customer requirement
  Packing Wrapped on Paper Core of 76mm ID, 86mm OD, Polythene Bag, Corrugated Cartons.

Note: 
1. Third layer can also be WR 360 or 600
2. F.G Surface